Piling.



'0. E. c, HARTUNG an J. BAUER. FILING.

APPLICATION FILED MAB. 31, 1902.

No. 724,573. 'PATBNTBD APR.7,1903.

I0 MODEL. 4

WITNESSES- ,Z0

UNITED STATES PATENT OFFICE. 'i

OTTO E. C. I-IARTUNG AND JQHN BAUER, OF SEATTLE, WASHINGTON.`

PILING.

SPECIFICATION forming part of Letters Patent No. 724,573, dated April 7, 1903.

Application filed March 3l, 1902.

To @ZZ whom if ntyconcern:

Be it known that we, OTTO E. C. HARTUNG and JOHN BAUER,citizens ofthe United States ofAmerica,and residents of the city of Seattle, in the county of King and State of Washington, have invented certain new and usefulImprovements in Piling, of which the following is a specification.

Our invention relates to improvements inA piles or like structural mem-bers', and has special reference to a support of this class which is employed in bridges, .wharves, seawalls, and like structures which are partly or wholly submerged.

Among numerous objects attained by this invention and readily understood from the following specification and accompanying drawings included as a part thereof is the production of a strong, durable, and efficient structural member'of the above-mentioned class and the embodiment with piles composed of fibrous material of efficient means for protecting them from the ravages of subaqueous insects, and which means shall also act to strengthen the pile and is readily and expeditiously combined therewith.

The above-mentioned and numerous' other objects equally as desirable are attained by the constructions, combinations, and arrangement of parts as disclosed on the drawings, set forth in this specification, and succinctly pointed out in the appended claims.

With referenceto the drawings filed herewith and bearing similar reference characters for corresponding parts throughout, Figure 1 isa transverse section of an ordinary pile or core composed of wood or like fibrous substance. Fig. 2 is a like section of such a pile or core indicated with a protective casing thereabout. Fig. 3 is a like section of such a casing with the pile or core removed. Fig. 4 is a similar section of the pile or core and the casing and indicates therebetween a jacket of uniting composition for the pile. Fig. 5 is a similar section of the pile or core and the jacket. Fig. `6 is a perspective view of a pile or core and the casing as'preferably embodied and indicatedV without a jacket. Fig. 7 is a side elevation of the lower end of a pile or core with the jacket, casing, and shoe indicated in longitudinal section. Fig.

Serial No. 100,857. (No model 8 is a plan view of the shoe, and Fig. 9 is a longitudinal section of the shoe.

Our invention includes a protective covering for piles, which is composed of brous substance, such as wood or the like, and which is herein designated for clearness as the core 10. This covering embodies a jacket, as 14, composed of a suitable uni-ting composition which is plastic when applied, but hardens 6o sired or usual manner, as by driving it to place.

The jacket 14 is preferably produced byconveniently placingatubularcasing,as12,about the 'core or pile 10 and which is closed at the lower end and rendered of suitable diameter to aiford a space 11 between the core and 7o inner wall of the casing of a suitable width to alford a jacket of the desired thickness, and into which space the cement is poured while plastic. This casing is preferably composed of sheet metal, and the lower ed 20 75 thereof is conveniently closed about the pile or core by rendering it conical, and the lower extremity 19 of this pile or core 10 is also vpreferably rendered conical or tapering to facilitate the driving thereof, and a metal 8o shoe, as 18, is preferably secured at this eX- tremity to facilitate the installation of the pile. As now considered the shoe 18 is formed from cast metal and rendered conical,

with a socket 21 in the upper end, which is 85 formed to t snugly over the end 19 of the pile, with the upper edge of the shoe conveniently forming a step, upon which the lower end of casing 14 rests and is thereby more surely kept in place during the process 9o of sinking the structural member.

In the present embodiment the casing 12 comprises tubular vsections,vas 15, conveniently formed of sheets of galvanized metal brought to cylindrical form and having their edges secured together by rivets, as 16, and then soldered to effect a water-tight joint, and these sections are likewise secured together and the end portion 2O likewise secured to the lower section, whereby the space rooA 11 is kept clear of water and the casing thereby made to protect the core 10 therefrom, and

the hardening or setting of the jacket 14 is thus also facilitated.

Granting installation of a core, as 10, having a protection-casing, as l2, thereabout extending to the desired height, the casting of the jacket in the space ll will be readily understood, as it simply involves the pouring of the cement while still plastic. After the jacket has set or hardened it serves to strengthen the core as well as protect it from the ravages of subaqueous insects, and the casing l2 serves to protect the jacket from blows or abrasions; but we do not limit ourselves to a structure thus completed, as the core can be combined in a permanent structure consisting of the core, a casing supported by said core, and a jacket, or the jacket and casing may be employed as an independent structure by withdrawing the core after the jacket is poured and before it has fully set or hardened.

Having thus described our invention, what we claim, and desire to secure by Letters Patent of the United States of America, is-

l. In a structural member of the nature indicated,a fibrous core,a metallic casing,means on the core to support said casing` as the member is installed and a composition jacket cast between said core and casing.

2. In a structural member of the nature indicated, a fibrous core, a metallic casing thereabout of greater diameter than the core and with the lower end tapered inwardly and a jacket between said core and casing composed of uniting composition cast in the casing after the core is installed.

3. In a structural member of the nature indicated, a fibrous core, a metallic casing thereabout of greater diameter than the core and installed simultaneously therewith, a 4o step on the core to support the casing and a jacket between said core and casing composed of cement'and cast in the casingafter the core has been installed.

4. In a structural member ofthe nature indicated, a iibrou's core having the lower end formed tapering, a conical-shaped shoe at the extremity of said end with the upper end su'rface adapted as a step, a metallic casing of greater diameter than said core and formed 5o OTTO E. C. HARTUNG. JOHN BAUER.

Witnesses:

JOHN R. PARKER, NICHOLAS SCHMITT. 

